Boiler plant with one or several front and rear boilers



A. wamwms BOILER PLANT WITH ONE OR SEVERAL FRONT AND REAR BOILERS 3. l h 0 r a M Patented Dec. 9, 1924.

UNITED STATES PATENT OFFICE.

ALBERT WINANDS, 0F MAGDEBURG, GERMANY.

BOILER PLANT WITH ONE OR SEVERAL FRONT AND REAR BOILERS.

Application filed. March 13, 1923.

Boiler Plants with One or Several Front and Rear Boilers, aspecification.

This invention relates to improvements in steam boiler plants, of the type in which one or several steam generators, each having upper and lower drums, are connected by water tubes; said drums being connected with a vertical drum in which water is heated for use in the steam generator.

A boiler plant constructed to accord with my invention has a vertical drum which is divided into five compartments by means of spaced partitions located within the vertical drum, the partitions forming boiler compartments which are substantially in the same horizontal plane as the drums of the main steam generator, the boiler compartments of the vertical drum being connected one to the other by tubes which pass through a central compartment, the boiler compartments having ways which connect the central compartment with the upper and lower compartments of said vertical drum.

My invention also consists in providing a vertical drum with a feed water supply, the upper boiler compartment of said vertical drum having an eXit opening for a discharge pipe, and an outlet for the upper compartment of said drum, there also being present, means for taking waterfrom the central compartment of said drum and de livering the same into the upper boiler compartment of the vertical drum.

My invention is intended to provide a steam generator which is connected with a Feed water heater or vertical drum having a plurality of compartments, the upper compartment thereof serving as a hot water or low pressure steam supply clhamber, the lower compartment into which a supplyof water for the main steam generator is delivered, serving as a sediment chamber, said chamber having therein the terminal of a pipe, to which steam and boiler pres sure may be discharged, such pipe being connected by appropriate valve with a dis charge pipe of the upper boiler compartment.

The invention also provides means for taking heated water from the central chamof which the following is Serial No. 624,820.

ber of the vertical drum and delivering the same to the upper boiler compartment of said vertical drum.

An embodiment of the invention is shown by the accompanying drawing, wherein:

Fig. 1 is a vertical section and Fig. 2 is a horizontal section.

The "front boiler consists of an upper drum a and a lower drum Z2 which are con nected, one with the other, by a bank of tubes 0. The rear drums f are connected with these front drums, said rear drums being constructed as vertical cylindrical drums heated from the outside. The rear drums are divided by two cross partitions g andagain by two other cross partitions u and-u into five compartments. The compartments X and Z are connected by tubes m, r and way i with the corresponding compartments of the drums a and b, and the compartments X and Z are connected with each other by a bank of tubes 7t, inserted and maintained by the cross partitions g and extending through the middle compartment 1 The compartments A and B are connected by tubes K and 0 with the middle compartment 3 The compartments A and B, together with the connecting ways K and 0 form a closed container which is not directly connected with the front drums. The compartments A and X are filled only partly with water, the water levels being indicated and lettered N W, the upper space of these compartments serving as steam chambers which are provided with steam outlets P and Q. The lower compartment B is connected with a feed water supply for the boiler by a pipe or conduit 02. By means of pipes or conduits t and o, and a pump to which the pipes are connected, the compartment 1 is connected with the compartment X. The compartment X above its Wat: level. is provided with disks 1, one is cup-shaped or deeper and of less diameter than those below it, and into this upper disk the end of the pipe or conduit 7* dips. The water pumped into the compart ment X through the pipe 01 flows into the upper cup-shaped disk Z, falls over its rim into the next lower disk and then into the third disk, dropping into the chamber X, the air being separated from the water and impurities contained in the water being deposited on the disks. If a determined steam pressure is present in X, the valve S The upper i when open admits steam from the front drum a through the pipe the lower end of which is located over the bottom of the lower compartment B, the pipe being curved and provided with outlet holes. The furnace is of appropriate construction and is provided with a superheater e, grate (Z, the usual dampers and fines, substantially as shown.

The water which flows from pipe at and discharges into the lower compartment B, and then through the way or tube 0 into the compartment '1, and then through the connecting way or tube K to the compartment A is heated first by the fine gases which pass about the enveloping walls of the furnace structure for the rear drums, and by the highly heated water which flows from the front drum a, through the tubes r into the compartment X and from said compartment to the compartment Z through the tubes 71, and further by the steam pressure generated in the front drum and flowing from compartment X through the valves Q and S to tube W, discharging into the compartment B. The water in the bank of tubes 0 flows, as it is heated by the gases of combustion, upward into the top drum or. The water level N in this top drum a is higher than the level N W in X, hence the water passes into the compartment X, flowing from-a to X, such arrangement insuring a strong water circulation, and an intense heating of the water fed into the com partment B soon after it has entered medial the compartment 3/, the degree of heat being such that impurities which might be contained in the water will be deposited upon the bottom wall 9 of the compartment y, and upon the bottom of the compartment B and may be easily removed therefrom. Any gases separated from the steam rise into the upper space or dome of compartment A and are removed together with the steam. Where there are other admixtures 'of the feed water, for instance the juice from sugar factories, they are also separated by the intense heating of the same. The front drumsa, b, and tubes care, of course, heated most intensively by the gases from combustion and they supply consequently the largest quantity of steam, the rear vertical drums f being less strongly heated by the furnace gases and by the tubes 71.. By blowing steam from the front drums a through pipes m into the compartment X, then into the compartments B, i and A, the contents of the same may be heated at the same temperature as the contents of the compartments of the drums a, b and tubes 0, and the total quantity of steam produced by the boiler plant may be taken from the outlet P.

The improved boiler plant is specially advantageous as steam for power engines or for working engines of any kind, and steam for boiling purposes may also be used; for instance, in cellulose factories, chemical factories and sugar factories. Such factories require periodically very .much steam for their boiling apparatus and therefore are required to have very large boiling plants with furnaces, which is expensive and not economical; or such factories are provided, as it has been recently done frequently, with large sized sepa ate heat accumulators which are also very expensive and which do not work economically owing to the considerable loss of heat. It is therefore better to combine the heat accumulator with the steam boiler as this is done according to the present invention in order that such heal may be used, as with my invention the products of combustion f or heal ing the boiler act directly upon the heat accumulator. The steam in excess is directly transferred from the boiler to the heat accumulator, passing through the intermediary of valve S.

By this invention, it has become possible to use heat accumulators, as shown, for many purposes at a considerable saving, much fuel economized and the furnaces may be much smaller and. will be able to work more uniformly than at present.

Steam engines for power work bestat the pressure for which they are constructed, generally high pressure, and it is consequently advisable to be able to maintain the pressure of the boilers always as high as possible. However, if much steam for boiling purposes is taken intermittently from the boiler plant which supplies the steam for the engines, the boiler pressure decreases rapidly, this very great inconvenience being avoided by my improved boiler plant. The front drums a, 7) and tubes 0 with X and Z form steam generators of: such a size that they are able to supply the steam for the engine and boiling purposes. The pressure in compartment X maintained and as this compartment supplies the steam f or the engines, they work economically with the most favorable supply and eflicieuey. The steam produced in excess by the front drums is transferred, so long as the boiling apparatus requires little or no steam, through the valve S and way W into lhc compartments B, y and A, until the liquid in these compartments has the same temperature and pressure as exists in the front drums. If a large amount of steam is talmn from compartment A to be used in a boiling apparatus, the pressure in com partmcut A may be reduced to one atmosphere, and the entire heat of the liquid withinv such pressure limit will serve for the re-evaporation of the water in the compartments A, 3 and B, so that a large amount of steam may be produced without lowering the pressure in drum (4, and the boiling apparatus will require less steam, or While at rest, heat is being accumulated in the Water in the compartments A, y and B.

I claim:

A steam boiler comprising upper and lower drums, water tubes for connecting said drums, a vertical drum having a top, a bottom and a central compartment, boiler compartments between the top, bottom and the central compartments, a way for con necting the lower boiler compartment With the lower drum, means positioned below the normal water level of the upper drum and the upper boiler compartment for establishing water communication between the upper drum and the upper boiler compartment, a pipe connection for steam between the upper portion of the upper drum and the upper portion of the upper boiler compartment, a Water supply for the vertical drum, means for taking Water from the central compartment of the vertical drum and delivering the same into the upper boiler compartment an exit for the top compartment of the vertical drum, an exit opening for the upper boiler compartment and a discharge pipe attached thereto, a branch pipe connected to the discharge pipe, the same terminating Within the lower compartment of the vertical drum, and a Valve interposed in said branch pipe.

In testimony whereof I affix my signature in presence of tWo Witnesses.

ALBERT VVINANDS. Witnesses:

E. HoL'rzERMAN, HAUER EYDLER.

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